<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1">
	<title>hello</title>
</head>
<body>
	<!-- 准备好容器 -->
	<div id="test1"></div>

	<!-- 引入react核心库，引入后全局多了一个React对象 -->
	<script src="../lib/react.development.js"></script>
	<!-- 引入react-dom，用于支持react操作dom，引入后全局多了一个ReactDOM对象 -->
	<script src="../lib/react-dom.development.js"></script>
	<!-- 引入babel，用于将jsx转为js -->
	<script src="../lib/babel.min.js"></script>
  <!-- 引入prop-types，用于对组件标签属性进行限制，引入后全局多了一个PropTypes对象 -->
  <script src="../lib/prop-types.js"></script>

	<script type="text/babel">
		
    class Demo extends React.Component{
      showInput1 = () => {
        alert(this.input1.value);
      }
      render() {
        return (
          <>
            <input ref={c => this.input1 = c} placeholder="点击按钮提示文本"/>
            <button onClick={this.showInput1}>点击按钮提示文本</button>
          </>
        )
      }
    }

		// 2.渲染虚拟DOM到页面
		ReactDOM.render(<Demo/>, document.getElementById('test1'));
	</script>
</body>
</html>